I have found the solution
betareg(formula, data) is equivalent to vglm(formula,betaff(zero=2),data) Sorry for the previous post. Justin BEM BP 1917 Yaoundé Tél (237) 76043774 ----- Mail original ----- De : justin bem <justin_...@yahoo.fr> À : R Maillist <r-h...@stat.math.ethz.ch> Cc : Envoyé le : Mercredi 17 Août 2011 20h30 Objet : [R] Obtain beta regression estimation for betareg and VGAM package Dear all, I'm trying to estimate beta regression with the betareg package and VGAM package With the betareg package (Cribari-Neto and Zeilis) I use this code betareg(formula, data) In my mind it possible with VGAM function vglm as vglm(formula,betaff, data) But betaff have two shapes and all coefficients are doubled in the second estimation. Is it possible to obtain the same estimation with the two packages ? Justin BEM BP 1917 Yaoundé Tél (237) 76043774 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. [[alternative HTML version deleted]]
______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
